TW201425815A - Lighting emitting diode automobile lamp - Google Patents

Abstract

A light emitting diode (LED) automobile lamp includes a light source and a lens. The light source is spaced from the lens. The LED automobile lamp further includes a light guiding plate. The light guiding plate includes a top surface. The top surface includes a horizontal section and an inclined section. The top surface is used for forming a cut-off line when being emitted by light from the light source.

Description

Light-emitting diode lamp

The invention relates to a light-emitting diode lamp, in particular to a light-emitting diode car base structure.

A light-emitting diode (LED) is a semiconductor component that converts current into light of a specific wavelength range. It has been widely used in various fields due to its high luminous efficiency, small size, light weight, and environmental protection. .

A lamp structure using an LED as an illuminator generally includes an LED light source, a reflective cover, a light shielding film, and a projection lens. The light shielding sheet is disposed in front of the LED light source to form a clear and legally defined cut-off line to adjust the light to a preset light pattern, and then is emitted by the projection lens. However, since the LED lamp having the louver structure does not get rid of the light blocking design, the utilization rate of the light emitted by the LED light source is low, the amount of light emitted is insufficient, and the light output effect is not good. Therefore, further improvement is needed.

In view of this, it is necessary to provide an LED lamp with high light extraction efficiency.

A light-emitting diode lamp, comprising a light source and a projection lens, the light source and the projection lens being spaced apart from each other, the light-emitting diode lamp further comprising a light guide plate, the light guide plate comprising a top surface, the top surface comprising a horizontal a segment and an inclined segment extending obliquely upward from the horizontal segment and extending away from the horizontal segment, the top surface being used to form a cut-off line during illumination, and the cut-off line at the horizontal segment is used to make the LED body The light from the lamp does not shine directly into the driver's eyes.

Compared with the prior art, the LED lamp of the present invention replaces the conventional light shielding plate with a light guide plate that makes the light source emit light with higher utilization rate, and the top surface is used to form a cut-off line that meets the regulations. The horizontal section of the top surface corresponds to the formed cut-off line segment so that the light does not directly hit the driver's eyes on the opposite side, thereby preventing glare on the opposite side. At the same time, the inclined section forms an angle with the horizon upward so that the LED lamp can illuminate the road condition of the right edge. The light guide plate adjusts the light emitted by the light source to a preset light type that meets the regulations, and enhances the light output efficiency of the LED light.

1 to 3 show a preferred embodiment of the LED lamp 100 of the present invention. The LED lamp 100 includes a light source 10, a light guide plate 20, a cymbal plate 30, and a projection lens 40.

The light source 10 includes a plurality of LED package structures 11 disposed on a circuit board (not shown) and electrically connected to the circuit board.

The light guide plate 20 is a light guide plate that emits light laterally, and includes a light incident surface 21, a top surface 22 opposite to the light incident surface 21, a light exit surface 23 adjacent to the light incident surface 21, and the light exiting surface. The opposite side 24 of the face 23, and the opposite side faces 25.

Referring to FIG. 3 , the light incident surface 21 covers the plurality of LED package structures 11 . The top surface 22 is used to form a cut-off line that meets the regulations to adjust the light emitted by the light source 10 to a preset light pattern. Specifically, the top surface 22 includes a horizontal section 221 and an inclined section 222 that is inclined upward from the end of the horizontal section 221 and extends away from the horizontal section 221 . In this embodiment, the angle between the inclined section 222 and the extension line of the horizontal section 221 is 15 degrees. As shown in FIG. 3, when the LED lamp 100 is in operation, the light emitted from the light source 10 forms a clear cut-off line at the top surface 22 via the light guide plate 20. Wherein, the cut-off line of the horizontal section 221 is such that the light does not directly hit the eyes of the driver of the opposite vehicle, thereby preventing the glare on the opposite side, and at the same time, the inclined section 222 can also illuminate the LED headlight 100 away from the driver of the opposite vehicle. Road conditions. In this embodiment, in order to comply with the relevant traffic regulations of China, the horizontal section 221 is located on the left side of the driving direction, and the inclined section 222 is located on the right side of the driving direction. It can be understood that the position of the horizontal section 221 and the inclined section 222 can be adaptively set according to traffic regulations of different countries. In addition, in order to achieve the best effect of preventing glare and illumination at the same time, the angle between the horizontal section 221 and the inclined section 222 is set to 15 degrees.

The light exit surface 23 distributes a plurality of light exit dots 26 having different densities. The light exiting dot 26 is a microstructure that destroys the total reflection formed when the emitted light is conducted in the light guide plate 20, and correspondingly enhances the scattering of the emitted light on the light exiting surface 23 to be emitted. The arrangement density of the light exit dots 26 is correspondingly set according to different illumination types specified by regulations. That is, the area where the light intensity is large is corresponding to the number of the light exiting dots 26, and the arrangement of the light exiting dots 26 is relatively tight. The area where the light intensity is small is corresponding to the number of the light exiting dots 26 which are arranged in a small amount, and the arrangement of the light exiting dots 26 is relatively evacuated, so that the areas of different light-emitting requirements are distinguished in the intensity of the emitted light. That is, the number of arrangement of the light-emitting dots 26 is larger in a region where the light-emission intensity is required to be larger than in the region where the light-emission intensity is small, and the arrangement density of the light-emitting dots 26 is larger in a region where the light-emission intensity is required to be larger than a region where the light-emission intensity is small.

The back surface 24 has the same shape as the light exit surface 23. The two sides 25 extend upward from the light-incident surface 21 and are adjacent to the light-emitting surface 23 and the back surface 24, and include a first side surface 251 and a second side surface 252, wherein the first side surface 251 is connected to the horizontal portion 221 and the light entering the light. On one side of the face 21 , the second side 252 connects the inclined section 222 and the other side of the light incident surface 21 , and the second side surface 252 is higher than the first side surface 251 . The top surface 22, the back surface 24, the first side surface 251, and the second side surface 252 are correspondingly provided with a plurality of light reflecting sheets 50 for reflecting the light incident from the light incident surface 21 to the light exiting surface 23 to be emitted.

The cymbal sheet 30 is located between the light guide plate 20 and the projection lens 40. The light emitted from the light guide plate 20 is refracted and condensed by the cymbal plate 30 to be incident on the projection lens 40. At the same time, the brightness of the concentrated light is enhanced. In this embodiment, the number of the cymbals 30 is two, that is, each cymbal 30 is an array of cymbals, and the arrays of the two cymbals are arranged at 90 degrees to each other to adjust the horizontal and vertical directions, respectively. The angle light is refracted to the projection lens 40.

The projection lens 40 includes a light incident surface 41 and a light exit surface 42 opposite to the light incident surface 41. The light incident surface 41 is spaced apart from the cymbal 30 by an appropriate distance. The light exit surface 42 is an aspherical surface. The light concentrated by the cymbal sheet 30 enters the projection lens 40 from the light incident surface 41 and is emitted to the outside through the light exit surface 42. It can be understood that the projection lens 40 can be a spherical lens.

Referring to FIG. 2, when the LED lamp is in operation, the plurality of LED package structures 11 emit light from the light incident surface 21 into the light guide plate 20, and are transmitted to the light exit surface 23 through the reflection of the side surfaces 251, 252 and the back surface 24, The plurality of light-emitting dots 26 having different densities on the light-emitting surface 23 are scattered and then emitted. Since the shape of the top surface 22 of the light guide plate 20 is substantially the same as the shape of the cut-off line defined by the regulations, the light emitted from the light guide plate 20 is adjusted to a preset light pattern and is directed to the cymbal sheet 30. The light of the predetermined light type is refracted and concentrated at the cymbal sheet 30, and the light pattern of the concentrated light remains unchanged at this time. The fiber is directed toward the projection lens 40 and corrected for exit.

Compared with the prior art, the LED lamp 100 of the present invention replaces the conventional light shielding sheet with the light guide plate 20 that causes the light source 10 to emit light with higher light utilization efficiency, and the horizontal and vertical sections 221 of the top surface 22 correspond to the cutoff of the light and dark. The line segment prevents the light from coming directly to the driver's eyes on the opposite side, thus preventing the opposite from running. At the same time, the inclined section 222 forms an angle with the horizon upward so that the LED vehicle lamp 100 can illuminate the road condition of the right edge. At the same time, the light-emitting surface 23 of the light guide plate 20 distributes a plurality of light-emitting dots 26 of different densities, and the plurality of light-emitting dots 26 of different densities distinguish the emitted light into different intensity types, and enhance the light-emitting efficiency of the LED lamp 100.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

100. . . LED lights

10. . . light source

20. . . Light guide

30. . . Bract

40. . . Projection lens

50. . . Reflective sheet

11. . . LED package structure

twenty one. . . Glossy surface

twenty two. . . Top surface

221. . . Horizontal section

222. . . Tilted section

twenty three. . . Glossy surface

twenty four. . . back

25. . . side

26. . . Light outlet

251. . . First side

252. . . Second side

41. . . Light incident surface

42. . . Light exit surface

FIG. 1 is a schematic diagram of a combination of LED lights according to an embodiment of the present invention, the LED lights including a light guide plate.

2 is a schematic cross-sectional view of the LED lamp of FIG. 1.

FIG. 3 is a schematic view of a light field of the LED vehicle lamp shown in FIG. 1 emitting light from the light guide plate.

100. . . LED lights

10. . . light source

20. . . Light guide

30. . . Bract

40. . . Projection lens

50. . . Reflective sheet

11. . . LED package structure

twenty two. . . Top surface

221. . . Horizontal section

222. . . Tilted section

twenty three. . . Glossy surface

25. . . side

26. . . Light outlet

251. . . First side

252. . . Second side

41. . . Light incident surface

42. . . Light exit surface

Claims (10)

A light-emitting diode lamp, comprising a light source and a projection lens, the light source and the projection lens being spaced apart from each other, wherein the light-emitting diode lamp further comprises a light guide plate, the light guide plate comprises a top surface, The top surface includes a horizontal section and an inclined section extending obliquely upward from the horizontal section and extending away from the horizontal section, the top surface being used to form a cut-off line when illuminated, and the corresponding cut-off line formed at the horizontal section is used for The light from the LED lights does not directly hit the driver's eyes. The light-emitting diode lamp of claim 1, wherein the light guide plate is a light guide plate that emits light laterally. The light-emitting diode lamp of claim 2, wherein the light guide plate comprises a light-emitting surface, the light-emitting surface is adjacent to the top surface, and the plurality of light-emitting dots having different distribution densities of the light-emitting surface The light emitted by the light source adjusts the luminous intensity of the emitted light by the plurality of light exiting dots. The light-emitting diode lamp according to claim 3, wherein the number of the light-emitting dots is more in a region where the light-intensity requirement is larger than in the region where the light-intensity requirement is small, and the arrangement density of the light-emitting dots is in the light-emitting. The area where the intensity demand is large is larger than the area where the light intensity demand is small. The light-emitting diode lamp of claim 4, wherein the light source comprises a plurality of light-emitting diode package structures, the light guide plate comprises a light-incident surface, the top surface and the light-incident surface In contrast, the light incident surface covers the plurality of light emitting diode package structures. The light-emitting diode lamp of claim 5, wherein the light guide plate comprises a back surface opposite to the light-emitting surface and two sides between the light-incident surface and the top surface, the top Reflectors are provided on the front, back and sides. The light-emitting diode lamp of claim 1, wherein the angle between the inclined section and the horizontal section is 15 degrees. The illuminating diode lamp of claim 1, further comprising a cymbal, the cymbal being located between the illuminating surface and the projection lens. The illuminating diode lamp of claim 1, wherein the projection lens is an aspherical lens. The light-emitting diode lamp of claim 1, wherein the horizontal section is located on the left side of the driving direction, and the inclined section is located on the right side of the driving direction.